Sparking igniter for explosive-engines.



No. 721,873.v PATENTED MAR. a, 1903. A. EVENSBN. SPARKING IGNITERFOR EXPLOSIVE ENGINES.

APPLICATION FILED MAR. 11, 1901.

N0 MODEL.

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UNITED STATES PATENT OFFICE.

ANTON EVENSEN, OF CHICAGO, ILLINOIS, ASSIGNOR OF ONE-HALF TO CHARLES R. HANNAN, OF COUNCIL BLUFFS, IOWA.

SPARKING IG NITER FOR EXPLOSIVE-E NGINES.

SPECIFICATION forming part of Letters Patent N 0.721 873, dated March 3, 1903.

Original application filed November 2, 1900, Serial No. 35,203- Divided and this application filed March 11, 1901. Serial To all whom, it may concern:

Be it known that I, ANTON EVENSEN, of Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Sparking Igniters for Explosivengines; and I do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings, and to the letters of reference marked thereon, which form a part of this specification.

This invention relates to igniting devices for explosive-engines of that kind actuated by the valve mechanism of said engine.

The invention consists in the matters hereinafter set forth, and more particularly pointed out in the appended claims.-

In the drawings, Figure 1 is a view of a cylinder-head of an explosive-engine, showing in longitudinal vertical section a valve-closure and casting fitted with an igniting device which embodies the features herein claimed. Fig. 2 is a View in horizontal longitudinal section through the head and valve. Fig. 3 is a view in end elevation of the valve and head. Fig. 4E is a vertical cross-sectiou through the valve and head.

The igniting device herein claimed is especially adapted for use in explosive-engines having a rocking valve of the type set forth in an application for explosive-engines filed by me November 2, 1900, Serial No. 35,203, this application being a division of said application Serial No. 35,203 for explosive-engines. While adaptable to any form of valve mechanism, the device is herein described in conjunction with a valve of the kind set forth in the above-mentioned application.

Referring to the drawings and the general disposition and arrangement of the parts of an engine to which an igniting device of the kind claimed by me herein may be fitted, A represents the casing of a valve which is connected with a cylinder-head B, said valve being operated by a cam-and-tappet mechanism, as described in said application for explosive-engines above mentioned. 7

Referring to the detail of the valve itself,

which, while it is somewhat minutely do- (No man.)

scribed herein,is not made the subject of this application, as above noted, the valve itself comprises a casing A and plug A. The casing isshown as having the form of a hollow cylinder extending across the outer face of the cylinder-head B of the engine, preferably integral therewith and transverse to the line of action of the engine. Said casing A is bored out to form a slightly-tapered bearing or coned valve-seat. The valve-plug A is in the form of a truncated cone, which is fitted to the tapered seat of the valve-casing. Said closure, which is bored and cored out to form exhaust and intake ports for the main engine, as set forth in said application for valves, is actuated by outer mechanism of any suitable kind, so that the closure rotates on its tapered seat, oscillating back and forth in unisonwith the piston movement of the engine. The plug A is provided with a valvestem 64. Said valve-stem has an insulatingbushing a, which extends into the plug to a point approximately midway between the larger end face thereof and the inner end wall of a central orifice which forms a part of the intake-port hereinbefore mentioned. A laterally extending bushing a extends from the inner end of said central bushing to a slot 17 in the cylinder-head B. Said insulating-bushing a contains an electrical conductor C of any suitable material, which is connected at its inner end with a terminal D, secured in the said laterally-extendinginsulating-bushing a by a set-screw a Said terminal D projects into a slotb of the cylinder-head B, said slot being so disposed insize and position that the outer end of the terminal projects into said slot throughout the partial revolutions of the closure. Said terminal has intermittent sliding connection with the fixed spring-terminal D, which is secured to the inner face of the cylinder-head B and over the aperture I). Said terminal D'is suitablyinsulated and has an electrical conductor leading therefrom. (Not shown.) Said terminals are of suitable material to withstand wearand oxidization. The relation and position of the two terminals D D are such that the oscillation of the valve-plug A causes them to make and break the igniting-circuit at each stroke of the piston, thereby producing the usual spark within the cylinder at the moment required.

The construction described affords a minimum of wearing parts, a certainty and ease of adjustment,and consequent minimum wear and low cost of production.

The parts herein shown and described may be of any convenient design to fit different engines, and I do not limit myself to the form and arrangement of the parts except as set forth in the claims.

I claim as my invention 1. The combination with an engine-cylinder provided with a valve-casing, having a tapered valve-seat, and a slot opening from the valve-seat into the cylinder, a valve-plug which has oscillatory motion in the valve-seat, an electric conductor extending through and insulated from the valve-plug and having a terminal which projects from the bearingsurface of the plug into the said slot, and a spring-terminal secured to the cylinder-wall with its free end overhanging said slot in position for contact of the first-mentioned terminal therewith in the oscillatory movement of the plug.

2. The combination, with an engine-cylinder provided with a valve having a tapered valve-seat and a slot opening from the valveseat into the cylinder, an oscillatory valveplug provided with a stem through which motion is communicated to the said plug, an electric conductor which extends axially through the stem and outwardly through the plug, is insulated from the stem and plug, and is provided with a terminal which projects from the bearing-surface of the pluginto said slot, and a spring-terminal which overhangs the said slot in position for engagement of the first-named terminal therewith in the oscillatory movement of the plug.

In testimony that I claim the foregoing as my invention I affix my signature, in presence of two witnesses, this 6th day of March, A. D. 1901.

ANTON EVENSEN. 

